If you can't make your own invitations, lots of people sell nice personalized ones on eBay. I bought some recently for my Daughter's graduation party. I didn't buy from the seller in the link below, but there are a lot of wording ideas there. Just do a search for photo invitations and a lot more will come up. Most of the sellers will do whatever you like. If you don't have a photo, there are plenty of other options as well.

Here is a link that might be useful: ebay photo invitations

I like the invitation blanks you can get to use at your own computer. I've seen them at Target, and I'm sure they are available lots of places, but I've only bought them at Kinko's, where they come 2 or 4 to a page, 25 pages to a pack, for $5.99. 25 envelopes are also $5.99. It is easy to make your own invitation on your computer (hint: make several copies of the blank to practice on until you are sure you have the alignment where you want it, and when you are ready to print, remember to set your printer to "best" quality).

I have used these twice this spring already, and it is easy and fast. I also had several people comment on how pretty the invitations were, so I guess they are as nice as the kind from the stationer, but lots faster and MUCH cheaper.

I don't know any quotes or poems about 60, but I don't think you need it. "Petunia and Cuthbert are 60!" ought to get the job done.